Fluid-pressure-regulating valve



CA L. BASTIAN.

FLUID PRESSURE REGULATING VALVE.

APPLICATION FILED JAN. 22, I919.

J A v y F w W Patented Oct. 18, 1921.

CHARLES Ii. BASTIAN, OF CHICAGO, ILLINQIS.

FLUID-PRESSURE-REGULATIN G VALVE.

Specification of Letters Patent.

Patented one. 18, 1921,

Application filed January 22, 1919. Serial No. 272,421.

To all whom it may concern:

Be it known that I, CHARLns L. BAsrrAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Fluid-Pressure- Regulatin Valves, of which the following isa speci cation.

This invention relates to fluid pressureregulatin valves of the type shown in my Patents 1T0. 1,161,917 patented November 30, 191? and No. 1,217,901 patented March 6, 191

I have found from practical experience that the valve disks are often excessively worn and permanently injured bycarelessness in adjusting the spring tensionto the desired pressure and sometimes it happens that the full pressure is allowed to act against the diaphragm with the spring tenslon released. In such cases the disk is often forced by the pressure against the nozzle seat until it is deeply out and ofttimes cracked or broken, thereby rendering it ineffective for further use. It is inexpedient to broaden the nozzle seat to prevent such injury to the disk because as the engaging surface is increased the sensitiveness of operation is decreased and much loss of'pressure results.

It is the object of my invention, therefore, to protect the valve disk against excessive Wear and injury and at the same time maintain the desired sensitiveness of operation.

I have also found that when one spring is used within another spring to provide the tension adjustment for the diaphragm there is a possibility, under some of the many conditions affecting the use of these valves, that the springs may be dislodged from their proper position in the bonnet and in relation toeach other in a manner which will prevent their proper operation.

It is also the object of my invention, therefore, to provide means for maintaining the springs in correct position in the bonnet of the valve so as to insure their proper operation at all times.

In the accompanying drawings illustratirig one embodiment of the invention Figure 1 is a central sectional view of the re lating valve;

ig. 2 is a plan view, partly in section, looking down upon the springs and diaphragm with the bonnet removed;

Fig. 3 is an enlarged sectional view of the nozzle;

Fig. 4 is a bottom as shown in Fig. 3;

Fig. 5 is a detail sectional view on a larger scale to show the double seat on the nozzle;

Fig. 6 is a perspective view of the diaphragm plate;

F ig. 7 is a detail view of the disk retainer.

Referring to the drawings, 8 is the body portion of the casing provided with two outlets 9, one for a pressure gage and the other for delivery to the work. The gas enters the valve through a pipe 10 rigid with the body and proi'ided with a nozzle 11 located within the yoke 12. This yoke is connected with the diaphragm 13 and carries the disk 14 to and from the seat formed on the discharge end of the nozzle.

The disk is made of fiber, hard rubber or other suitable material and is snugly fitted, preferably under pressure, in the recess 15 against the annular shoulder 16 formed by plan view of the nozzle,

the inclined walls 17 of the retainer ring 18.

which threadedly engages the disk support- 19. The retainer carrying the disk is screwed into place in the disk support until the disk is rigidly seated in the recess 19 of said support, whereupon the disk will be securely confined within the sup-port by the retainer and the retainer not only serves to hold the disk in place by engagement with the outer face thereof but it also confines the disk by engaging the periphery thereof and thereby tends to prevent the disk from spreading or breaking.

The nozzle 11 is provided with an external stepped series of annular valve seats, the

illustration in the drawing being that of two seats, 20, 21, arranged in different planes one above the other, the lower primary seat 20 being located adjacent the nozzle opening and the upper or secondary seat 21 being disposed around the primary seat 20. I prefer to make the primary seat with a narrower engaging surface than the secondary seat, as shown in Fi 5, but the primary seat should have su cient engaging surface to form an effective seal while still preserving the desired sensitiveness of operation under the normal and proper conditions of operation of the valve. I

A screw 22 operates in the bonnet 23 which is threadedly engaged with the body of the casing and incloses the outer heavy and a projection 28 on the diaphragm plate 29 which is secured to the yoke 12 in the usual manner. The outer spring fits freely within the bonnet and upon the inner spring and it is held in proper position by the guides 30 on the diaphragm plate. Thus the inner spring is interiorly guided and the outer spring is exteriorly guided and it is not necessary to-fit the outer spring on the inner spring so closely that the convolutions of the springs will catch upon each other or so loosely that the inner end of the outer spring may drop out of centered position and thus cause imperfect operation of the diaphragm. The interior guiding of the inner spring holds that spring in centered position in the bonnet and upon the diaphragm and the exterior guiding of the outer spring maintains the same in proper relation to the inner spring, aswell as to the diaphragm, so that there will be no interfrence of one spring with the other in actual use and'both springs will always bemaintained in proper relation to each other and to the diaphragm.

In practice the diaphragm is adjusted by properly tensioni'ng the springs to provide for an even flow of gas at a predetermined pressure. The valve disk is' carried to and from its seat against the nozzle by the diaphragm as the pressure Within the casing of the valve fluctuates. Thus, when the pressure is slightly in excess ofthe spring tension the disk will be seated; and when the pressure is decreased slightly below the tension of the springs the disk will be un-' seated. During the normal operation of the valve under a proper adjustment of the springs the disk will be seated against the inner, lower primary seat 20. This seat is annular in form and by reason of the narrowness of its engaging surface a very sensitive operation of the valve is obtained. In event that the springs are insufficiently tensioned to provide a. proper balance for the valve disk, or in the event that the springs are entirely released, "it may happen that the pressure wili be sufficient to force the disk not only against the primary seat 20 but also against the secondary seat 21, and in such case the combined areas of the two seats will be ainply sufficient to provide an efiective seal. Thus the primary seat with a comparatively narrow annular engaging surface is sufficient under normal and proper adthe nozzle and maintain the desired sensitiveness of operation, while the secondary seat constitutes a safety and provides that additional engagingsurface which may be necessary to seal the nozzle under abnormal conditions of operation. This secondary seat is brought into action automatically to supplement the primary seat when it becomes necessary in order to seal the nozzle against the pressure which brings this secondary seat into action. And I have found that this arrangement of a primary and a secondary seat not only secures superior sealing effect as herein described but also protects the seat against excessive wear and injury. If the primary seat alone proves to be insufficient under any conditions to provide an effective seal for the nozzle the secondary seat will automatically be brought into sealing action before the disk is damaged and the combined seats are suflicient to provide to make all such adaptations and changes as may fairly fall within the scope of the accompanying claims.

I claim:

1. In a pressure regulating valve, the combination of an inlet nozzle, a support having a recess therein, a disk arranged in said recess in operative position to seal the nozzle, and a retainer engaging said disk periph- -erally and on the outer face thereof and threadedly engaging said recess to the disk in said support.

2. in a pressure regulating valve, the combination of an inlet nozzle, an exteriorly threaded retainer ring having an annular shoulder therein, a disk securely held in said ring against said shoulder, and a support having a recess therein to receive said disk and threaded to receive said ring.

3. In a pressure regulating valve, the combination of an inlet nozzle, an exteriorly threaded retainer ring having an annular shoulder therein, a disk forced'into saidming against said shoulder under pressure, whereby said ring tightly-confines peripherally a substantial portion of said disk, and means for supporting said disk with the rin thereon and the face of that portion of tie disk confined within the ring in operative relation to said inlet nozzle.

4:. A pressure-regulating-valve nozzle having two independent seats in different planes.

5. A pressure-regulating-Valvenozzle having a stepped series of annular'valve seats at the discharge end of the nozzle to sueces'sively come into engagement with a valve.

6. A pressure-regulatingvalve nozzle having an external stepped series of annular valve seatssurrounding the discharge end of the nozzle and adapted to successively come into engagement'with a/valve.

7. A pressure-regulating-valve nozzle having two independent annular seats arranged one within the other in different planes and with engaging surfaces of different widths.

8. A pressure-regulating-valve nozzle having an external stepped series of annular valve seats of different widths and surrounding the discharge end of the nozzle.

9. In a pressure-regulating-valve, the combination of a nozzle and a diaphragm-controlled valve for the nozzle, said valve having a flat face to seat against the delivery end of the nozzle, and said nozzle having an external stepped series of annular valve seats to successively come into engagement with the flat face of the valve as the latter wears.

10. As a new article of manufacture, a pressure-regulating-valve nozzle comprising a body provided with a longitudinal openended passage, said body having an intermediate external enlargement constituting a wrench seat, the inlet end of the nozzle being cylindrical and externally screw threaded, the discharge end of the nozzle havin an external annular valve seat surrounding the longitudinal passage, and also provided with another external annular valve seat surrounding the longitudinal passage and in rear of the first mentioned seat, the two seats constituting a stepped series of seats' v v 11. In a pressure regulating valve, a nozzle of hard material adapted to be closed by a valve disk of relativel soft material, said nozzle having a steppe series of valve seats adapted to successively come into contact with said valve disk as said nozzle penetrates said disk due to wear or pressure.

12. In a pressure re lating valve, a nozzle of hard material a apted to be closed by a valve disk of relatively soft material, said nozzle having two independent annular seats in stepped relation and of different widths adapted to successively engage the said valve disk as said nozzle penetrates said disk due to wear or pressure.

' 13. Ina pressure regulating valve, a nozzle of hard material adapted to be closed by a soft valve disk, said nozzle having two independent annular seats arranged in stepped relation, the foremost seat being narrow, the rearmost seat beingbroad and engaging the said valve disk after the foremost seat has penetrated said valve disk.

14:. In a pressure regulating valve, a hard nozzle adapted "to be closed by a soft disk, said nozzle having a narrow seat at its end to form a sensitive seal with said disk and in stepped relation thereto, a broad seat adapted to contact with said disk when said narrow seat has penetrated said disk due to wear or pressure.

CHARLES L. BASTIAN. 

